To learn Duman - Helal Olsun chords, grasp the musical fabric of the song with this sequence - A, G, B, F#m, G, Bm, E, Em and G of chords. Begin your practice at a relaxed 36 BPM, then work your way up to the song's BPM of 72. Fine-tune the capo based on your vocal range, ensuring it complements the key of E Minor.